الفهرس 
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Abstract
This study was carried out to investigate the effect of manual
versus electrical tooth brushing on surface roughness of different resin composites with reference of the following: 1-Types of resin composites, i.e., microhybrid versus nanofilled resin composites. 2-Techniques of toothbrushing, i.e., manual versus electrical toothbrushes. 3-Types of toothbrush bristles, i.e., soft versus medium toothbrush bristles. 4-Times of brushing, i.e., 10,20 minutes.